Machine for damping printing-paper



UNITED sTATEs PATENT oEEToE.

ANDREW OVEREND, OF PHILADELPHIA, PENNSYLVANIA.

MACHINE FOR DAI/[PING PRINTING-PAPER.

Specification of Letters Patent No.` 10,627, dated March`14, 1854. l

on which the paper rests removed. Fig. 2

is the table on which the paper is placed after it has been wetted. Fig. 3 is a detached view of the mechanism for operating the fly. Fig. 4t is a detached view of the mechanism for moving forward the feed board of Fig. 1.

In order that the impression may be properly made by the printing press it is necessary that each sheet of paper Should be damped to a certain extent. To wet the atime.

sheets of paper in a uniform manner and to aproper eXtent great care is required. 1t has been heretofore generally performed by the hand-a few sheets only being wetted at This is a tedious and where-A large editions are printed, an expensive process.

The nature of my improved machine Yis such that by the aid of a belt connected with the ordinary gearing of a printing` office a single person can wet as much paper in a day as 6 or 8 persons could wet by hand labor alone.

To enable others skilled in -t-he art to make and use my improved machine I proceed to describe its construction and mode of operation. Y

A, B, C, D, Fig. l, represents a wooden frame work on which the partsl of the apparatus are supported.

G, I-I, I, K represents the feedboard on which the sheets of extended paper about to be wetted are placed. The kstrip Gr H fits into slots in each-side of the board and is adjustable to the size of thefsheets of paper to be wetted.

M is a large main roller having its surface covered with blanket or felt. /It is placed upon the main or driving shaft of the apparatus and is turned by a crank or pulley placed at O. This roller M turns with one half of its surface immersed in a trough of water N. Above this roller M a second felt- -with the'surface of roller M.

ed roller L is placed with its journals turning in a slotted bearing at b. The roller L is of just the diameter of the roller M and I i as the formeristurned by its contact with' the lattertheroller L makes two revolutions to one of the roller M. `By this arrangement of the two felted rollers, the lower roller M is kept constantly. saturated with*V 'i i water and the upper rollerL becomes saturated by revolving in contact `with Vhen the paper isintroduced between these i rollers, as hereinafter Vdescribed the upper.. l -A roller L rises in its Slotted'bearings so as tof permit the paper topass through. The

roller -L imparts its moisture to the upperV surface and the roller M to the lower surface fof the paper'. By this simple. arrangement, 1

the upper roller L alternately derives moisture from theV lower roller ,M, and imparts it again to the upper surface of.` the paper passing through. kThus the necessity? for.` a

sprinkling Vapparatus on theVV upperl i side? vof f the paper, or within the upp-er roller which v A have been hitherto suggested are obviated. I

deem it best to make the lower roller M of twice the diameter of the upper roller L so vthat one revolutionV of M will insure the g wettingof L and also the passage `of the 1 paper. The two rollers may, however, .be of the same diameter and then the same result sive kfeedings of paper.

is fed in at a time. A small projection. C is placed at one portion of the circumference of rollerM, anda similar projection at the opposite end of the lroller M. The paper is fed in at such intervals that the moment the edge of the quire of paper enters between the rollers, the projection C and its correspending 'projection shall just pass under;

the roller L and thus force the surface of roller L to rise for an instant' from contact' `at the edges of the quire of paper and wet it at the edge too much. A quire of paper is fed through for each revolution of M.

The first half of the revolutionof Mis employed in saturating the felt on roller L with water. At the second half of the revo-- lution of M the paper enters and is wetted on the lower side by M and on the upper by L. The weight of the roller L pressing upon M forces the water into the body of the quire. A guide tape similar in its action to those used on printing presses passes around the roller L and the small roller S. Another set of three guide tapes also surrounds roller M and roller T T. The paper passes out from between the rollers L and M and between the upper and lower sets of guide tapes. The lower set of guide tapes on to the strips of the Hy P P P P P P is a fly constructed as the ordinary fly attached to printing presses is constructed. It turns on an axis atpV W, and is operated by a cog wheel at W geared into a cog wheel g. g is rotated by a crank 7a (see Fig. 3) and a sliding rod z'. terminating in aV small friction roller K which presses on a cam or eccentric Z. Zris placed on the end of the shaft of the cylinder M. A spring is placed at s to press the little roller K against the cam. As the eccentric or cam c rotates the roller K is alternately pushed backward and forward and thus the rod i forces the wheel g to make a partial revolutionl backward and forward. The

. wheel g is so geared into W that every time the rod z' slides back and forth the fly P P `makes a partial rot-ation about V W from the position shown in the drawing to the table t. Thus the quires of wetted paper are successively carried by the sets of tapes into the fly and are placed by the fly in a smooth pile on the tablev t. The table z5 is so constructed that as the pile of paper increases in height the table is depressed in the same proportion and thus thelevel of the surface of the paper is kept constant. This facilitates the action of the fly and is effected by supporting the top of the table t by two pair of X shaped pieces Z X Z X and Z X Z AX which are free to extend on the points y and y. A spiral spring l is placed around the rod y y and connected with the pieces Z X Z X and Z X Z X in such a manner that as Z and Z and Z diverge the spiral spring l will become more tense. As the weight upon the table t increases it depresses the table and extends Z X and Z X and Z X Z X overcoming the tension of the spring l. When the weight of paper is removed the spring 1 reacts and elevates the table t.

The feed board G H I K is made to ad- Vance toward the wetting rollers L M at the proper intervals of time to introduce the paper, between these rollers. The advancing of this feed board is effected by an arrangement placed under the feed board and partially hidden by it in Fig. 1 but shown detached in Fig. 4. A small rock shaft 27 3 the shaft of M revolves, the arm 11 pushes the arm 2, 7 down, and thus acts on the rock shaft 2 3, and advances the Vfeed board Ctoward the wetting rollers. When the arm 11 has reached its `lowest point the arm 2, 7

slips over it and a spring under the feed` board restores it to its ordinary position.

Having thus described the construction and operation of the several parts I will briefly describe the operation of the entire machine. 1

The paper to be wetted is placed in a pile on a board extended across the top of the standards supporting roller L and thosel This arm j supporting roller s s (this board has been j removed in the drawing to show the parts below it).

by any convenient application of power. A quire of paper extended is laid upon the feed bo-ard Gr H I K with the edge ofthe paper projecting about two inches toward: As the main shaft revolves the` feed board advances and inserts t-he edge of the rollers.

the sheet of paper between the wetting rollers L and M; At the moment of the entrance of the paper the roller L rises by the action of the projection c and immediately afterwards falls again. The paper is then forced through by the rollers L and M and at the same time the pressure of the rollers saturates the paper with water. The paper as it emerges is carried between the tapes on to the fly P P and as soon as it is entirely on the fly, the fly makes a partial ro-` The trough is filled with` water and the main Vshaft of cylinder M is rotated tation deposites the paper smoothly and in j a pile on the table t and then returns again to its former position. The self adjusting character of the table and its advantage has been explained above.

VExperience has shown that the apparatus above described operated by a boy or girl only will operate abo-ut 400 reams of paper in a day with more uniformity and exactness than 6 or 8 persons 4could possibly do;

by hand labor.

Having l thus described my improved paper wetting machine what I desire tol claim and secure by Letters Patent is* l. The self acting feed board arranged and operating as herein described. i

2. The arrangement and combination of `the upper and lower felted rollers for the purpose of saturating the upper roller in the intervals between the passage of the 4. The combination ofthe wetting cylpaper, in the manner substantially as hereinders and fly substantially as hereinbefore nbefore described. described. v

3. The projections c, c, for the purpose of ANDW. OVEREND. 5 breaking the bead as the paper enters ar- Witnesses:

ranged and operating substantially as here- CHARLES D. FREEMAN in described. J. E. SHAW. 

